Nonlinear Optical Up-Conversion in Terahertz Parametric Process: Simulation and Experiment

Kong, Weipeng; Yan, Qiang; Li, Zeyu; Zou, Mingrui; Zhou, Xun; Qin, Yu

doi:10.1109/tthz.2021.3054181

Cited by 6 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This problem can be solved from two aspects: on the one hand, the signal recovery algorithm needs to be established to get a correct charge result, which can refer to the recovery process of the PEA method. On the other hand, the optical parametric process can be used to improve the generation process of THz wave, which can extract its specific wavelength part and reduce the oscillating pulses [31], [32]. Further, the generated THz wave is invisible due to its characteristic.…”

Section: The Proposed Optical Methods Based On Thementioning

confidence: 99%

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

Ren

Gao

et al. 2021

IEEE Sensors J.

View full text Add to dashboard Cite

The resolution performance of space charge measurement method determines its application environment and measured information, which has put forward higher temporal and spatial resolution requirements for the charge evaluation of electronic equipment insulation. Based on the ellipsometry detection principle and the photoelastic effect of the sensor, a novel optical method for space charge measurement is proposed. The potentials of the method in terms of single measurement with high signal-to-noise ratio, terahertz bandwidth and nanometer spatial resolution are analyzed. By deriving the mathematical relationship of the signal transmission, it is indicated that the light intensity difference measured by the system can linearly present the elastic force generated from space charge. Based on the built ellipsometry detection system, it is found that the detected signal from the sensor can quickly track the imposed elastic waves with different amplitudes and frequencies, which verifies the feasibility of the crucial detection part and the fast measurement speed of the proposed method. Further simulation results indicate that the refractivity performance of the sensor under the effect of elastic waves can present the deformation variation with a spatial resolution of 2 nm. Therefore, the given explorative research can provide the key theoretical basis and experimental verification for the proposed method.

show abstract

Section: The Proposed Optical Methods Based On Thementioning

confidence: 99%

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

Ren

Gao

et al. 2021

IEEE Sensors J.

View full text Add to dashboard Cite

show abstract

“…[5][6][7] Based on the stimulated polariton scatter-ing and optical parametric amplification in nonlinear crystals, parametric up-conversion detection has been demonstrated as a promising THz detector for possessing the advantages of widely detectable range, high sensitivity, fast response, and room temperature operation. [8][9][10] Through the input of THz wave and intense laser in nonlinear crystal simultaneously, the THz wave with low energy could be up-converted to be near infrared Stokes laser under the non-collinear phase-matching condition. Thus, THz wave can be indirectly measured by using the high-sensitive near-infrared detector.…”

Section: Introductionmentioning

confidence: 99%

High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

Wang¹,

Nie²,

Hu³

et al. 2022

Chinese Phys. B

View full text Add to dashboard Cite

A high-sensitive terahertz detector operating at room temperature was demonstrated based on parametric up-conversion. A nanosecond 1064-nm Nd:YAG laser was used to pump the parametric up-conversion detector and the up-conversion from terahertz wave to NIR laser was realized in a lithium niobate crystal. The minimum detectable terahertz energy of 9 pJ was realized with the detection dynamic range of 54 dB, which was three orders of magnitude higher than that of commercial Golay cell. The detectable terahertz frequency range of the detection system was 0.90 Thz–1.83 THz. Besides, the effects of pump energy and effective gain length on the detection sensitivity were studied in experiment. The results showed that higher pump energy and longer effective gain length are helpful for improving the detection sensitivity of parametric up-conversion detector.

show abstract

A Scanning-Free Terahertz Frequency Domain Spectroscopy

Qin,

Zou,

et al. 2023

J Infrared Milli Terahz Waves

View full text Add to dashboard Cite

Nonlinear Optical Up-Conversion in Terahertz Parametric Process: Simulation and Experiment

Cited by 6 publications

References 34 publications

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

A Scanning-Free Terahertz Frequency Domain Spectroscopy

Contact Info

Product

Resources

About